In Progress® Telerik® UI for AJAX prior to v2026.2.708, the obsolete RadChart component's ChartImage.axd handler is vulnerable to unauthenticated file read and deletion of image-extension files within the application directory.

In Progress® Telerik® UI for AJAX prior to v2026.2.708, applications using cookie-based storage in RadPersistenceManager or RadDockLayout deserialize attacker-controlled cookie content, allowing unauthenticated remote code execution.